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  <h2>{4}</h2>
  <p>
   The <c>{0} cells {1}</c> are the only possible positions of the
   <g>{0} values <b>{2}</b></g> in the <b1>{3}</b1>.
   Because the number of possible cells matches the number of values,
   these <c>{0} cells</c> must contain these <g>{0} values</g> in any order.
  </p>
  <p>
   <r>Other potential values</r> can therefore be removed from these <c>cells</c>.
  </p>
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